US4921082A - Fluid control cylinder assembly for automobile brake system - Google Patents

Fluid control cylinder assembly for automobile brake system Download PDF

Info

Publication number
US4921082A
US4921082A US07/126,731 US12673187A US4921082A US 4921082 A US4921082 A US 4921082A US 12673187 A US12673187 A US 12673187A US 4921082 A US4921082 A US 4921082A
Authority
US
United States
Prior art keywords
piston
brake fluid
brake
clutch pedal
control cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/126,731
Other languages
English (en)
Inventor
Byung K. Kang
Jin C. So
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YOUNG-BHUM SHIN
Original Assignee
YOUNG-BHUM SHIN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by YOUNG-BHUM SHIN filed Critical YOUNG-BHUM SHIN
Assigned to YOUNG-BHUM, SHIN, reassignment YOUNG-BHUM, SHIN, ASSIGNMENT OF A PART OF ASSIGNORS INTEREST Assignors: KANG, BYUNG K., SO, JIN C.
Application granted granted Critical
Publication of US4921082A publication Critical patent/US4921082A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/20—Tandem, side-by-side, or other multiple master cylinder units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K20/00—Arrangement or mounting of change-speed gearing control devices in vehicles
    • B60K20/02—Arrangement or mounting of change-speed gearing control devices in vehicles of initiating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/103—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices
    • B60T11/105—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices with brake locking after actuation, release of the brake by a different control device, e.g. gear lever
    • B60T11/106—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices with brake locking after actuation, release of the brake by a different control device, e.g. gear lever locking and release of the brake by the clutch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18109—Braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/14—Clutch pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/18—Braking system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18109—Braking
    • B60W30/18118—Hill holding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S188/00—Brakes
    • Y10S188/02—Hill holder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87257—Hydraulic brake line [e.g., hill holders]

Definitions

  • This invention relates to a brake system in an automobile and particularly to a fluid control cylinder assembly between a master cylinder and wheel cylinders and operated by a clutch pedal for auxiliary brake application.
  • An object of this invention is to provide a brake system which overcomes the above mentioned disadvantages.
  • a further object of the invention is to provide a hill-holder in the brake system of an automobile operated by the clutch pedal.
  • Another object of this invention is to provide a brake system which stops an automobile safely and properly even in the event of bursting of one of the brake lines in the automobile.
  • a fluid control cylinder assembly comprising a fluid control cylinder, a bracket member and an operating lever.
  • the control cylinder assembly is positioned between the master cylinder and wheel cylinders and below the clutch pedal, which members are connected one with another.
  • the control cylinder is divided into two chambers and has holes or inlets and outlets around the peripheries thereof. Check valve balls are provided for closing and opening of the outlets.
  • the control cylinder assembly is secured onto the front wall of the automobile.
  • FIG. 1 is a perspective view of a control cylinder assembly o present invention
  • FIG. 2 is a side elevational view of the control cylinder assembly partially broken away and in cross-section showing connection of a piston operating lever to the control cylinder and location of the assembly below the clutch pedal;
  • FIG. 3 is an exploded view of the control cylinder
  • FIG. 4 is a longitudinal cross-sectional view of the control cylinder assembly during driving with no clutch or brake pedal depressed;
  • FIG. 5 is an enlarged fragmentary cross-sectional view of the control cylinder of the present invention during driving with the brake pedal depressed;
  • FIG. 6 is a cross-sectional view similar to FIG. 4 with the clutch pedal depressed
  • FIG. 7 is a view similar to FIG. 6 with the brake pedal depressed after the clutch pedal has been depressed;
  • FIG. 8 is a view similar to FIG. 5 showing the moment when the brake pedal is released from the driver's foot with the clutch pedal raised a little;
  • FIG. 9 is a view similar to FIG. 6 with the clutch pedal further than in FIG. 8;
  • FIG. 10 view similar to FIG. 6 showing the condition where the brake line of a back wheel has burst
  • FIG. 11 is a view similar to FIG. 6 showing the condition where the brake line of a front wheel has burst
  • FIG. 12 a top plan view of the control cylinder assembly of FIG. 1 showing connection of the assembly to the clutch pedal;
  • FIG. 13 is a perspective view of the control cylinder assembly of the present invention showing connection of the assembly to brake lines;
  • FIG. 14 is an end view of the control cylinder assembly of the present invention showing its connection on the front wall within an automobile;
  • FIG. 15 is a schematic side view of a clutch pedal showing the movable distance thereof.
  • FIG. 16 a cross-sectional view of the holes which are formed in the side for fluid outlets of the control cylinder.
  • an oil control cylinder assembly comprising an oil control cylinder 1, a bracket member 26 and a lever member 30.
  • the oil control cylinder 1 as shown in FIG. 4 has two rear and front chambers A, B, respectively, therein which are divided by a central wall 1a.
  • the central wall 1a has a central through hole 1c.
  • the control cylinder 1 has outwardly protruding portions through which through holes 14, 15, 16 and 17 are provided, which are used as fluid inlets and outlets.
  • the inlets 14, 15 are for receiving fluid from a master cylinder C therethrouqh. Through the outlets 16, 17 fluid flows out into brake lines. Into the protruding portions having inlets and outlets 14, 15, 16 and 17 nipples 2, 3, 4 and 5 are threaded.
  • the inlet 15 is concentric with the central through hole 1c.
  • a rear piston 6 and a piston rod 7 are provided connected to each other.
  • the rear cup-shaped piston has a piston rod spring 11 therein.
  • the piston rod 7 is circumferentially widened at one end which is inserted into the piston and held in position by a snap ring 20 and resiliently urged outwardly by the spring 11.
  • a piston spring 10 has its free length located circumferentially around the outer portion of the piston rod 7 and is mounted on a spring seat 18 at one end.
  • the check valve ball 22 is provided under the nipple 4 and urged by a spring 24 for sealing engagement with the fluid inlet 16.
  • the front chamber B has a piston 8 therein which is connected to a push rod 9.
  • the circumferentially widened rear end of push rod 9 is inserted into piston 8 and held in place by a snap ring 20'.
  • the front cup-shaped piston 8 has a push rod spring 13 therein to urge the push rod 9 outwardly.
  • a valve seal 9a is supported and engages sealingly on the other end of the push rod 9.
  • valve seal 9a is for sealing engagement with the inlet 15.
  • the front end of the push rod 7 passes through the central hole 1c of the wall 1a and is held in abutting position against the bottom of the front piston 8.
  • a sealing packing 1b is provided opposingly to the sealing packing 19 for sealing engagement with the central hole 1c.
  • the sealing packing 1b serves to allow shifting of the push rod 7 but prevents passing of fluid.
  • a coil spring 12 under compression is located between the nipple and the piston 8 for maintaining proper abutment of the bottom of the piston 8 against the front end of the push rod 7.
  • a plurality of compression O-rings 21 are located around the outer peripheries of the pistons 6, 8 for fitting snugly to the inner walls of the chambers A, B.
  • Check valve ball 23 is provided for closing the outlet 17 concentric with the nipple 5.
  • a bracket member 26 with an L-shaped piston operating lever 30 and a U-shaped support member 31 is bolted to the control cylinder by bolts 27.
  • the L-shaped piston operating lever 30 has two upper and lower holes in its base section for receiving respective pins 28, 29. By the pin 28 the lever 30 is connected to the bracket member 26.
  • Bracket member 26 is secured to the body of the vehicle on the wall adjacent the clutch pedal (see FIGS. 14 and 15) by bolts 48.
  • Bolt 47 threadedly engages a hole in an upper part of bracket 26 and the end thereof engages against an upper surface on lever 30 so that bolt 47 controls the degree of rotation of the lever.
  • the U-shaped support member 31 has two flat prongs on which aligned holes are formed for engaging the pin 29.
  • the pin 29 passes through the lower hole of the lever 30 and the two holes of the U-shaped support member 31.
  • a nut 32 (FIG. 4) is welded and with the nut 32 a thread 33a of a rod 33 is engaged, thus moving with the U-shaped support member 31.
  • a space control bolt 34 engages the nut formed on the laterally protruding end portion 30a of the lever 30.
  • a lock nut 35 located between the bolt 34 and nut portion 30a serves to prevent the bolt 34 from inadvertently releasing from nut portion 30a and also serves to control the height of the bolt 34.
  • the bracket 26 has an upper rectangular member and a pin 36 is located between the opposing walls of the upper rectangular member as shown in FIG. 1.
  • a plate 37 is mounted on the pin 36 by a suitable length of a coil spring 39 which coil spring is wound around one end of the pin 36.
  • the plate 37 has one end located below the space control bolt 34, and the other end has semi-oval cut-out portion 37' (FIG. 4) positioned between a cap 40a of a piston rearward movement stop pin 40 and a cap bolt 41.
  • the control cylinder 1 has another through hole for receiving the piston rearward movement stop pin 40.
  • the cap 40a is threaded onto the stop pin 40. Below the cap 40a is provided a cap bolt 41.
  • a coil spring 38 is located about the middle portion of the piston rearward movement stop pin 40 and between a shoulder on the stop pin and the bolt 41.
  • a bellows tube 42 housing the rod 33 is threaded onto the thread 33a of the rod 33 by a nut 43 located at one end thereof. In use, the bellows tube 42 serves to prevent foreign matters such as dust from entering the control cylinder 1.
  • a coil spring 44 within the bellows tube 42 and around the outer periphery of the rod 33 facilitates expansion and contraction of the bellows tube 42.
  • a guide tube 46 is located inside control cylinder 1 for the proper forward and rearward movement of rod 33 and is held in place by a C-ring 45.
  • the piston rod 7 has a hole 7' for receiving fluid and a V-shaped cut-out portion 7" through which fluid is returned to the hole 7'.
  • An exhaust plug 53 is provided adjacent the outlet through nipple 4 for exhausting air or fluid and an exhaust hole 1' is provided for exhausting moisture or the like.
  • the outlets 16, 17 have continuous small return flow by-pass openings or gaps 16', 17' as shown in FIG. 16.
  • FIG. 4 shows the control cylinder assembly when the automobile is in its driving or stopping position. In this condition the fluid is filled within the control cylinder 1 and the brake lines.
  • the piston 6 having the widened end of the piston rod 7 secured therein is in its utmost rearward position with the bottom being abutted to the guide cylinder 46 and the end of the rod 33.
  • the cylinder spring 10 has the free length thereof.
  • the circular hole 1c is in unsealed position since the sealing packing 19 is spaced apart from the central wall la so that the fluid received into the inlet 14 may be moved into the rear chamber A.
  • the front piston 8 is spaced from the central wall 1a abutting the end of the piston rod 7.
  • the valve 9a is also spaced from the inlet 15 since piston 8 is forcibly compressed rearwardly by the force of the cylinder spring 12.
  • the check valve balls 22, 23 close the outlets 16, 17 since no fluid pressure is exerted thereon and the pressure of the springs 24, 25 is exerted thereon.
  • the stop pin 40 with the spring 38 around it is in the upward position.
  • FIG. 7 shows when the brake pedal E is depressed with the clutch pedal D already having been depressed.
  • the force of the fluid from the master cylinder C has forced the spring seat 18 with packing 19 and the push rod 9 with packing 9a to be respectively separated from the central wall 1a and inlet 15 for receiving fluid into the chambers A, B, thereby pushing the pistons 6, 8 rearwardly.
  • further rearward movement of rear piston 6 is not allowed since the end portion of the stop pin 40 is caught on the back portion of the back piston 6.
  • rod 33 is also pushed rearwardly causing the clutch pedal D to be slightly moved upwardly, such movement is so small as to be insignificant so that the clutch is maintained in its position of disengagement.
  • the fluid received at the time when the push rod 9 and sealing packing 19 are pushed rearwardly pushes the check valve balls 22, 23 off their seats so that fluid pressure is transmitted to the wheel cylinders f, f' thereby operating the brake shoes thus stopping the car.
  • the check valve balls 22, 23 quickly sealingly engage the outlets 16, 17 for preventing backflow of the fluid through the outlets 16, 17, thereby even in the foot's released position from the brake pedal E the engine is in the starting position without jolting or slipping of the car.
  • the outlets 16, 17 are formed with gaps 16', 17' at their one end.
  • shifting of the fluid is prevented since the chambers A and B are tightly sealed. In this condition since the fluid does not flow backwardly from the brake lines into the chambers A, B the car maintains the stopped position. There often tends to be backward slipping of the car. In this case as shown in FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
  • Braking Elements And Transmission Devices (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Braking Arrangements (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
US07/126,731 1987-07-24 1987-11-30 Fluid control cylinder assembly for automobile brake system Expired - Fee Related US4921082A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR8079/87 1987-07-24
KR1019870008079A KR900001440B1 (ko) 1987-07-24 1987-07-24 자동차 클러치 페달을 이용한 전,후진방지 유압브레이크 장치

Publications (1)

Publication Number Publication Date
US4921082A true US4921082A (en) 1990-05-01

Family

ID=19263273

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/126,731 Expired - Fee Related US4921082A (en) 1987-07-24 1987-11-30 Fluid control cylinder assembly for automobile brake system

Country Status (4)

Country Link
US (1) US4921082A (enrdf_load_stackoverflow)
EP (1) EP0308049A3 (enrdf_load_stackoverflow)
JP (1) JPS6436553A (enrdf_load_stackoverflow)
KR (1) KR900001440B1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060152079A1 (en) * 2002-09-21 2006-07-13 Erwin Werner Method and device for preventing a stationary vehicle from unintentionally rolling away

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5040648A (en) * 1990-11-05 1991-08-20 Caterpillar Inc. Electrohydraulic control device for a drive train of a vehicle
KR101418326B1 (ko) * 2012-12-24 2014-07-10 주식회사 만도 브레이크 시스템용 마스터실린더
DE102021213186A1 (de) * 2021-11-23 2023-05-25 Continental Automotive Technologies GmbH Bremsgerät mit einer elastischen Schutzvorrichtung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2190981A (en) * 1938-09-24 1940-02-20 Wagner Electric Corp Fluid braking system
US2251787A (en) * 1939-12-30 1941-08-05 Wagner Electric Corp Electrically operated brake control mechanism
US4247154A (en) * 1978-07-24 1981-01-27 Nippon Air Brake Co., Ltd. Brake control valve
US4520911A (en) * 1982-08-23 1985-06-04 Allied Corporation Vehicle attitude responsive brake control device
US4540072A (en) * 1981-06-27 1985-09-10 Nippon Air Brake Co., Ltd. Brake holder
US4553651A (en) * 1983-09-02 1985-11-19 Allied Corporation Combination hill holder and proportioning valve mechanism
US4610338A (en) * 1983-07-14 1986-09-09 Nissan Motor Co., Ltd. Brake device for controlling brake operation on inclines
US4658942A (en) * 1983-04-25 1987-04-21 Nissan Motor Co., Ltd. Liquid pressure operated braking system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3442786A1 (de) * 1984-11-23 1986-05-28 Lucas Industries P.L.C., Birmingham, West Midlands Hauptbremszylinder fuer zweikreis-bremsanlagen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2190981A (en) * 1938-09-24 1940-02-20 Wagner Electric Corp Fluid braking system
US2251787A (en) * 1939-12-30 1941-08-05 Wagner Electric Corp Electrically operated brake control mechanism
US4247154A (en) * 1978-07-24 1981-01-27 Nippon Air Brake Co., Ltd. Brake control valve
US4540072A (en) * 1981-06-27 1985-09-10 Nippon Air Brake Co., Ltd. Brake holder
US4520911A (en) * 1982-08-23 1985-06-04 Allied Corporation Vehicle attitude responsive brake control device
US4658942A (en) * 1983-04-25 1987-04-21 Nissan Motor Co., Ltd. Liquid pressure operated braking system
US4610338A (en) * 1983-07-14 1986-09-09 Nissan Motor Co., Ltd. Brake device for controlling brake operation on inclines
US4553651A (en) * 1983-09-02 1985-11-19 Allied Corporation Combination hill holder and proportioning valve mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060152079A1 (en) * 2002-09-21 2006-07-13 Erwin Werner Method and device for preventing a stationary vehicle from unintentionally rolling away
US7401873B2 (en) * 2002-09-21 2008-07-22 Zf Friedrichshafen Ag Method for preventing a stationary vehicle from unintentionally rolling

Also Published As

Publication number Publication date
KR890001806A (ko) 1989-04-06
JPH0453743B2 (enrdf_load_stackoverflow) 1992-08-27
EP0308049A2 (en) 1989-03-22
EP0308049A3 (en) 1990-06-13
KR900001440B1 (ko) 1990-03-10
JPS6436553A (en) 1989-02-07

Similar Documents

Publication Publication Date Title
JP3444601B2 (ja) 二輪車用油圧式ブレーキ装置及びその装置を有する二輪車
US4017125A (en) Inversion brake valve and system therefor
US5036960A (en) Apparatus and method of automotive brake with booster piston
JPH0130663B2 (enrdf_load_stackoverflow)
JPS6241863Y2 (enrdf_load_stackoverflow)
EP0142290B1 (en) Master cylinder with internal reservoir
US4921082A (en) Fluid control cylinder assembly for automobile brake system
US4050746A (en) Inversion brake valve and system therefor
US4133584A (en) Brake fluid pressure control valve of a deceleration sensing type
EP0357220B1 (en) Brake booster
GB2102518A (en) Brake control apparatus
US4111495A (en) Load sensing proportioner with proportioner delay
US4534172A (en) Master cylinder assembly for a vehicle hydraulic braking system
JPS6137137B2 (enrdf_load_stackoverflow)
US4915131A (en) Hill-holder
CA1041579A (en) Fluid pressure braking system including a pressure differential responsive valve device
US3009449A (en) Brake booster
US4237772A (en) Hydraulic ratio-changing booster with hydraulic lock
US4472942A (en) Tandem brake master cylinder with anti bottoming system
US6195993B1 (en) Master cylinder with hydraulic reaction and selective self-powering
US6217132B1 (en) Hydraulic control unit having a master cylinder and anti-lock braking valves integrally mounted therein
JPH11504299A (ja) 自動車用流体ブレーキ装置
GB2129520A (en) A master cylinder assembly for a vehicle hydraulic braking system
EP0110303A2 (en) Brake system for vehicle
US4520911A (en) Vehicle attitude responsive brake control device

Legal Events

Date Code Title Description
AS Assignment

Owner name: YOUNG-BHUM, SHIN,, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF A PART OF ASSIGNORS INTEREST;ASSIGNORS:KANG, BYUNG K.;SO, JIN C.;REEL/FRAME:005148/0677

Effective date: 19890801

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19940501

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362